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-rw-r--r--kernel/arch/powerpc/include/asm/rtas.h469
1 files changed, 469 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/include/asm/rtas.h b/kernel/arch/powerpc/include/asm/rtas.h
new file mode 100644
index 000000000..7a4ede16b
--- /dev/null
+++ b/kernel/arch/powerpc/include/asm/rtas.h
@@ -0,0 +1,469 @@
+#ifndef _POWERPC_RTAS_H
+#define _POWERPC_RTAS_H
+#ifdef __KERNEL__
+
+#include <linux/spinlock.h>
+#include <asm/page.h>
+#include <linux/time.h>
+
+/*
+ * Definitions for talking to the RTAS on CHRP machines.
+ *
+ * Copyright (C) 2001 Peter Bergner
+ * Copyright (C) 2001 PPC 64 Team, IBM Corp
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#define RTAS_UNKNOWN_SERVICE (-1)
+#define RTAS_INSTANTIATE_MAX (1ULL<<30) /* Don't instantiate rtas at/above this value */
+
+/* Buffer size for ppc_rtas system call. */
+#define RTAS_RMOBUF_MAX (64 * 1024)
+
+/* RTAS return status codes */
+#define RTAS_NOT_SUSPENDABLE -9004
+#define RTAS_BUSY -2 /* RTAS Busy */
+#define RTAS_EXTENDED_DELAY_MIN 9900
+#define RTAS_EXTENDED_DELAY_MAX 9905
+
+/*
+ * In general to call RTAS use rtas_token("string") to lookup
+ * an RTAS token for the given string (e.g. "event-scan").
+ * To actually perform the call use
+ * ret = rtas_call(token, n_in, n_out, ...)
+ * Where n_in is the number of input parameters and
+ * n_out is the number of output parameters
+ *
+ * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
+ * will be returned as a token. rtas_call() does look for this
+ * token and error out gracefully so rtas_call(rtas_token("str"), ...)
+ * may be safely used for one-shot calls to RTAS.
+ *
+ */
+
+typedef __be32 rtas_arg_t;
+
+struct rtas_args {
+ __be32 token;
+ __be32 nargs;
+ __be32 nret;
+ rtas_arg_t args[16];
+ rtas_arg_t *rets; /* Pointer to return values in args[]. */
+};
+
+struct rtas_t {
+ unsigned long entry; /* physical address pointer */
+ unsigned long base; /* physical address pointer */
+ unsigned long size;
+ arch_spinlock_t lock;
+ struct rtas_args args;
+ struct device_node *dev; /* virtual address pointer */
+};
+
+struct rtas_suspend_me_data {
+ atomic_t working; /* number of cpus accessing this struct */
+ atomic_t done;
+ int token; /* ibm,suspend-me */
+ atomic_t error;
+ struct completion *complete; /* wait on this until working == 0 */
+};
+
+/* RTAS event classes */
+#define RTAS_INTERNAL_ERROR 0x80000000 /* set bit 0 */
+#define RTAS_EPOW_WARNING 0x40000000 /* set bit 1 */
+#define RTAS_HOTPLUG_EVENTS 0x10000000 /* set bit 3 */
+#define RTAS_IO_EVENTS 0x08000000 /* set bit 4 */
+#define RTAS_EVENT_SCAN_ALL_EVENTS 0xffffffff
+
+/* RTAS event severity */
+#define RTAS_SEVERITY_FATAL 0x5
+#define RTAS_SEVERITY_ERROR 0x4
+#define RTAS_SEVERITY_ERROR_SYNC 0x3
+#define RTAS_SEVERITY_WARNING 0x2
+#define RTAS_SEVERITY_EVENT 0x1
+#define RTAS_SEVERITY_NO_ERROR 0x0
+
+/* RTAS event disposition */
+#define RTAS_DISP_FULLY_RECOVERED 0x0
+#define RTAS_DISP_LIMITED_RECOVERY 0x1
+#define RTAS_DISP_NOT_RECOVERED 0x2
+
+/* RTAS event initiator */
+#define RTAS_INITIATOR_UNKNOWN 0x0
+#define RTAS_INITIATOR_CPU 0x1
+#define RTAS_INITIATOR_PCI 0x2
+#define RTAS_INITIATOR_ISA 0x3
+#define RTAS_INITIATOR_MEMORY 0x4
+#define RTAS_INITIATOR_POWERMGM 0x5
+
+/* RTAS event target */
+#define RTAS_TARGET_UNKNOWN 0x0
+#define RTAS_TARGET_CPU 0x1
+#define RTAS_TARGET_PCI 0x2
+#define RTAS_TARGET_ISA 0x3
+#define RTAS_TARGET_MEMORY 0x4
+#define RTAS_TARGET_POWERMGM 0x5
+
+/* RTAS event type */
+#define RTAS_TYPE_RETRY 0x01
+#define RTAS_TYPE_TCE_ERR 0x02
+#define RTAS_TYPE_INTERN_DEV_FAIL 0x03
+#define RTAS_TYPE_TIMEOUT 0x04
+#define RTAS_TYPE_DATA_PARITY 0x05
+#define RTAS_TYPE_ADDR_PARITY 0x06
+#define RTAS_TYPE_CACHE_PARITY 0x07
+#define RTAS_TYPE_ADDR_INVALID 0x08
+#define RTAS_TYPE_ECC_UNCORR 0x09
+#define RTAS_TYPE_ECC_CORR 0x0a
+#define RTAS_TYPE_EPOW 0x40
+#define RTAS_TYPE_PLATFORM 0xE0
+#define RTAS_TYPE_IO 0xE1
+#define RTAS_TYPE_INFO 0xE2
+#define RTAS_TYPE_DEALLOC 0xE3
+#define RTAS_TYPE_DUMP 0xE4
+/* I don't add PowerMGM events right now, this is a different topic */
+#define RTAS_TYPE_PMGM_POWER_SW_ON 0x60
+#define RTAS_TYPE_PMGM_POWER_SW_OFF 0x61
+#define RTAS_TYPE_PMGM_LID_OPEN 0x62
+#define RTAS_TYPE_PMGM_LID_CLOSE 0x63
+#define RTAS_TYPE_PMGM_SLEEP_BTN 0x64
+#define RTAS_TYPE_PMGM_WAKE_BTN 0x65
+#define RTAS_TYPE_PMGM_BATTERY_WARN 0x66
+#define RTAS_TYPE_PMGM_BATTERY_CRIT 0x67
+#define RTAS_TYPE_PMGM_SWITCH_TO_BAT 0x68
+#define RTAS_TYPE_PMGM_SWITCH_TO_AC 0x69
+#define RTAS_TYPE_PMGM_KBD_OR_MOUSE 0x6a
+#define RTAS_TYPE_PMGM_ENCLOS_OPEN 0x6b
+#define RTAS_TYPE_PMGM_ENCLOS_CLOSED 0x6c
+#define RTAS_TYPE_PMGM_RING_INDICATE 0x6d
+#define RTAS_TYPE_PMGM_LAN_ATTENTION 0x6e
+#define RTAS_TYPE_PMGM_TIME_ALARM 0x6f
+#define RTAS_TYPE_PMGM_CONFIG_CHANGE 0x70
+#define RTAS_TYPE_PMGM_SERVICE_PROC 0x71
+/* Platform Resource Reassignment Notification */
+#define RTAS_TYPE_PRRN 0xA0
+
+/* RTAS check-exception vector offset */
+#define RTAS_VECTOR_EXTERNAL_INTERRUPT 0x500
+
+struct rtas_error_log {
+ /* Byte 0 */
+ uint8_t byte0; /* Architectural version */
+
+ /* Byte 1 */
+ uint8_t byte1;
+ /* XXXXXXXX
+ * XXX 3: Severity level of error
+ * XX 2: Degree of recovery
+ * X 1: Extended log present?
+ * XX 2: Reserved
+ */
+
+ /* Byte 2 */
+ uint8_t byte2;
+ /* XXXXXXXX
+ * XXXX 4: Initiator of event
+ * XXXX 4: Target of failed operation
+ */
+ uint8_t byte3; /* General event or error*/
+ __be32 extended_log_length; /* length in bytes */
+ unsigned char buffer[1]; /* Start of extended log */
+ /* Variable length. */
+};
+
+static inline uint8_t rtas_error_severity(const struct rtas_error_log *elog)
+{
+ return (elog->byte1 & 0xE0) >> 5;
+}
+
+static inline uint8_t rtas_error_disposition(const struct rtas_error_log *elog)
+{
+ return (elog->byte1 & 0x18) >> 3;
+}
+
+static inline uint8_t rtas_error_extended(const struct rtas_error_log *elog)
+{
+ return (elog->byte1 & 0x04) >> 2;
+}
+
+#define rtas_error_type(x) ((x)->byte3)
+
+static inline
+uint32_t rtas_error_extended_log_length(const struct rtas_error_log *elog)
+{
+ return be32_to_cpu(elog->extended_log_length);
+}
+
+#define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG 14
+
+#define RTAS_V6EXT_COMPANY_ID_IBM (('I' << 24) | ('B' << 16) | ('M' << 8))
+
+/* RTAS general extended event log, Version 6. The extended log starts
+ * from "buffer" field of struct rtas_error_log defined above.
+ */
+struct rtas_ext_event_log_v6 {
+ /* Byte 0 */
+ uint8_t byte0;
+ /* XXXXXXXX
+ * X 1: Log valid
+ * X 1: Unrecoverable error
+ * X 1: Recoverable (correctable or successfully retried)
+ * X 1: Bypassed unrecoverable error (degraded operation)
+ * X 1: Predictive error
+ * X 1: "New" log (always 1 for data returned from RTAS)
+ * X 1: Big Endian
+ * X 1: Reserved
+ */
+
+ /* Byte 1 */
+ uint8_t byte1; /* reserved */
+
+ /* Byte 2 */
+ uint8_t byte2;
+ /* XXXXXXXX
+ * X 1: Set to 1 (indicating log is in PowerPC format)
+ * XXX 3: Reserved
+ * XXXX 4: Log format used for bytes 12-2047
+ */
+
+ /* Byte 3 */
+ uint8_t byte3; /* reserved */
+ /* Byte 4-11 */
+ uint8_t reserved[8]; /* reserved */
+ /* Byte 12-15 */
+ __be32 company_id; /* Company ID of the company */
+ /* that defines the format for */
+ /* the vendor specific log type */
+ /* Byte 16-end of log */
+ uint8_t vendor_log[1]; /* Start of vendor specific log */
+ /* Variable length. */
+};
+
+static
+inline uint8_t rtas_ext_event_log_format(struct rtas_ext_event_log_v6 *ext_log)
+{
+ return ext_log->byte2 & 0x0F;
+}
+
+static
+inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
+{
+ return be32_to_cpu(ext_log->company_id);
+}
+
+/* pSeries event log format */
+
+/* Two bytes ASCII section IDs */
+#define PSERIES_ELOG_SECT_ID_PRIV_HDR (('P' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_USER_HDR (('U' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_PRIMARY_SRC (('P' << 8) | 'S')
+#define PSERIES_ELOG_SECT_ID_EXTENDED_UH (('E' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_FAILING_MTMS (('M' << 8) | 'T')
+#define PSERIES_ELOG_SECT_ID_SECONDARY_SRC (('S' << 8) | 'S')
+#define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR (('D' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_FW_ERROR (('S' << 8) | 'W')
+#define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID (('L' << 8) | 'P')
+#define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID (('L' << 8) | 'R')
+#define PSERIES_ELOG_SECT_ID_HMC_ID (('H' << 8) | 'M')
+#define PSERIES_ELOG_SECT_ID_EPOW (('E' << 8) | 'P')
+#define PSERIES_ELOG_SECT_ID_IO_EVENT (('I' << 8) | 'E')
+#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO (('M' << 8) | 'I')
+#define PSERIES_ELOG_SECT_ID_CALL_HOME (('C' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_USER_DEF (('U' << 8) | 'D')
+#define PSERIES_ELOG_SECT_ID_HOTPLUG (('H' << 8) | 'P')
+
+/* Vendor specific Platform Event Log Format, Version 6, section header */
+struct pseries_errorlog {
+ __be16 id; /* 0x00 2-byte ASCII section ID */
+ __be16 length; /* 0x02 Section length in bytes */
+ uint8_t version; /* 0x04 Section version */
+ uint8_t subtype; /* 0x05 Section subtype */
+ __be16 creator_component; /* 0x06 Creator component ID */
+ uint8_t data[]; /* 0x08 Start of section data */
+};
+
+static
+inline uint16_t pseries_errorlog_id(struct pseries_errorlog *sect)
+{
+ return be16_to_cpu(sect->id);
+}
+
+static
+inline uint16_t pseries_errorlog_length(struct pseries_errorlog *sect)
+{
+ return be16_to_cpu(sect->length);
+}
+
+/* RTAS pseries hotplug errorlog section */
+struct pseries_hp_errorlog {
+ u8 resource;
+ u8 action;
+ u8 id_type;
+ u8 reserved;
+ union {
+ __be32 drc_index;
+ __be32 drc_count;
+ char drc_name[1];
+ } _drc_u;
+};
+
+#define PSERIES_HP_ELOG_RESOURCE_CPU 1
+#define PSERIES_HP_ELOG_RESOURCE_MEM 2
+#define PSERIES_HP_ELOG_RESOURCE_SLOT 3
+#define PSERIES_HP_ELOG_RESOURCE_PHB 4
+
+#define PSERIES_HP_ELOG_ACTION_ADD 1
+#define PSERIES_HP_ELOG_ACTION_REMOVE 2
+
+#define PSERIES_HP_ELOG_ID_DRC_NAME 1
+#define PSERIES_HP_ELOG_ID_DRC_INDEX 2
+#define PSERIES_HP_ELOG_ID_DRC_COUNT 3
+
+struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
+ uint16_t section_id);
+
+/*
+ * This can be set by the rtas_flash module so that it can get called
+ * as the absolutely last thing before the kernel terminates.
+ */
+extern void (*rtas_flash_term_hook)(int);
+
+extern struct rtas_t rtas;
+
+extern void enter_rtas(unsigned long);
+extern int rtas_token(const char *service);
+extern int rtas_service_present(const char *service);
+extern int rtas_call(int token, int, int, int *, ...);
+extern void rtas_restart(char *cmd);
+extern void rtas_power_off(void);
+extern void rtas_halt(void);
+extern void rtas_os_term(char *str);
+extern int rtas_get_sensor(int sensor, int index, int *state);
+extern int rtas_get_power_level(int powerdomain, int *level);
+extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
+extern bool rtas_indicator_present(int token, int *maxindex);
+extern int rtas_set_indicator(int indicator, int index, int new_value);
+extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
+extern void rtas_progress(char *s, unsigned short hex);
+extern void rtas_initialize(void);
+extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data);
+extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data);
+extern int rtas_online_cpus_mask(cpumask_var_t cpus);
+extern int rtas_offline_cpus_mask(cpumask_var_t cpus);
+extern int rtas_ibm_suspend_me(u64 handle);
+
+struct rtc_time;
+extern unsigned long rtas_get_boot_time(void);
+extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
+extern int rtas_set_rtc_time(struct rtc_time *rtc_time);
+
+extern unsigned int rtas_busy_delay_time(int status);
+extern unsigned int rtas_busy_delay(int status);
+
+extern int early_init_dt_scan_rtas(unsigned long node,
+ const char *uname, int depth, void *data);
+
+extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
+
+#ifdef CONFIG_PPC_PSERIES
+extern time64_t last_rtas_event;
+extern int clobbering_unread_rtas_event(void);
+extern int pseries_devicetree_update(s32 scope);
+extern void post_mobility_fixup(void);
+#else
+static inline int clobbering_unread_rtas_event(void) { return 0; }
+#endif
+
+#ifdef CONFIG_PPC_RTAS_DAEMON
+extern void rtas_cancel_event_scan(void);
+#else
+static inline void rtas_cancel_event_scan(void) { }
+#endif
+
+/* Error types logged. */
+#define ERR_FLAG_ALREADY_LOGGED 0x0
+#define ERR_FLAG_BOOT 0x1 /* log was pulled from NVRAM on boot */
+#define ERR_TYPE_RTAS_LOG 0x2 /* from rtas event-scan */
+#define ERR_TYPE_KERNEL_PANIC 0x4 /* from die()/panic() */
+#define ERR_TYPE_KERNEL_PANIC_GZ 0x8 /* ditto, compressed */
+
+/* All the types and not flags */
+#define ERR_TYPE_MASK \
+ (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC | ERR_TYPE_KERNEL_PANIC_GZ)
+
+#define RTAS_DEBUG KERN_DEBUG "RTAS: "
+
+#define RTAS_ERROR_LOG_MAX 2048
+
+/*
+ * Return the firmware-specified size of the error log buffer
+ * for all rtas calls that require an error buffer argument.
+ * This includes 'check-exception' and 'rtas-last-error'.
+ */
+extern int rtas_get_error_log_max(void);
+
+/* Event Scan Parameters */
+#define EVENT_SCAN_ALL_EVENTS 0xf0000000
+#define SURVEILLANCE_TOKEN 9000
+#define LOG_NUMBER 64 /* must be a power of two */
+#define LOG_NUMBER_MASK (LOG_NUMBER-1)
+
+/* Some RTAS ops require a data buffer and that buffer must be < 4G.
+ * Rather than having a memory allocator, just use this buffer
+ * (get the lock first), make the RTAS call. Copy the data instead
+ * of holding the buffer for long.
+ */
+
+#define RTAS_DATA_BUF_SIZE 4096
+extern spinlock_t rtas_data_buf_lock;
+extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
+
+/* RMO buffer reserved for user-space RTAS use */
+extern unsigned long rtas_rmo_buf;
+
+#define GLOBAL_INTERRUPT_QUEUE 9005
+
+/**
+ * rtas_config_addr - Format a busno, devfn and reg for RTAS.
+ * @busno: The bus number.
+ * @devfn: The device and function number as encoded by PCI_DEVFN().
+ * @reg: The register number.
+ *
+ * This function encodes the given busno, devfn and register number as
+ * required for RTAS calls that take a "config_addr" parameter.
+ * See PAPR requirement 7.3.4-1 for more info.
+ */
+static inline u32 rtas_config_addr(int busno, int devfn, int reg)
+{
+ return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) |
+ (devfn << 8) | (reg & 0xff);
+}
+
+extern void rtas_give_timebase(void);
+extern void rtas_take_timebase(void);
+
+#ifdef CONFIG_PPC_RTAS
+static inline int page_is_rtas_user_buf(unsigned long pfn)
+{
+ unsigned long paddr = (pfn << PAGE_SHIFT);
+ if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf + RTAS_RMOBUF_MAX))
+ return 1;
+ return 0;
+}
+
+/* Not the best place to put pSeries_coalesce_init, will be fixed when we
+ * move some of the rtas suspend-me stuff to pseries */
+extern void pSeries_coalesce_init(void);
+#else
+static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;}
+static inline void pSeries_coalesce_init(void) { }
+#endif
+
+extern int call_rtas(const char *, int, int, unsigned long *, ...);
+
+#endif /* __KERNEL__ */
+#endif /* _POWERPC_RTAS_H */